Studies on the effects of selenium on rumen microbial fermentation in vitro

Kim, Juhee; Soest, P.J. Van; Combs, Gerald F.

doi:10.1007/bf02785393

Cited by 27 publications

(22 citation statements)

References 18 publications

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“…Fermentação ruminal e absorção de selênio Selenito e selenato podem ser reduzidos a Se elementar (Se 0 ) pelos microrganismos ruminais como um meio de detoxificação (KIM et al, 1997). Os microrganismos podem também incorporar Se na proteína microbiana (HIDIROGLOU & LESSARD, 1976;KIM et al, 1997).…”

Section: Selênio Nos Alimentosunclassified

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Fontes orgânicas e inorgânicas de selênio na nutrição de vacas leiteiras: digestão, absorção, metabolismo e exigências

Gierus¹

2007

Cienc. Rural

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Section: Selênio Nos Alimentosunclassified

“…Os microrganismos podem também incorporar Se na proteína microbiana (HIDIROGLOU & LESSARD, 1976;KIM et al, 1997). Desse modo, o Se na ração, presente na forma inorgânica, pode ser absorvido no intestino delgado na forma orgânica.…”

Section: Selênio Nos Alimentosunclassified

Fontes orgânicas e inorgânicas de selênio na nutrição de vacas leiteiras: digestão, absorção, metabolismo e exigências

Gierus¹

2007

Cienc. Rural

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“…In fact, numerous studies showed that Secompounds affect ruminal microorganism yield and activity of microbiota [1][2][3][4][5][6]. Thus, Se-compounds affect VFAs production and rumen microbial fermentation [5,6].Analyses of the Se content in the ruminal microorganisms revealed that the microbial Se abundance was enriched relatively to the dietary level of Se [7]. Microorganisms are also able to synthesize Se-Met and Se-cysteine (Se-Cys), and these Se-AA are subsequently incorporated into microbial Se-proteins.…”

mentioning

confidence: 99%

The Influence of Different Chemical Forms of Selenium Added to the Diet Including Carnosic Acid, Fish Oil and Rapeseed Oil on the Formation of Volatile Fatty Acids and Methane in the Rumen, and Fatty Acid Profiles in the Rumen Content and Muscles of Lambs

et al. 2016

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Lambs were divided into 3 groups of 6 animals each. For 35 days lambs were fed a diet including 2% rapeseed oil, 1% fi sh oil and 0.1% carnosic acid (the control group) or two experimental diets supplemented with 0.35 mg • kg -1 Se as selenized-yeast (SeY) (the SeY diet) or selenate (the selenate diet). Muscles (Musculus longissimus dorsi (MLD) and Musculus biceps femoris (MBF)), ruminal fl uids and microbiota were collected from each lamb. SeY supplementation most effectively stimulated the accumulation of straightchain volatile fatty acids (VFAs), iso-branched-chain VFAs, CO 2 and CH 4 in the ruminal fl uid. The contents of CO 2 , CH 4 and VFAs including straight-chain VFAs with the exception of iso-branched-chain VFAs were most effectively reduced by the selenite diet. The control diet most effi ciently increased the concentration sums of odd-saturated fatty acids (odd-SFAs) and iso-SFAs in microbiota. The SeY diet most effi ciently reduced acetic acid to propionic acid ratio in the ruminal fl uid. The selenate diet improved animal performance by reducing ruminal concentrations of CH 4 and CO 2 . The SeY diet and especially the selenate diet reduced the biohydrogenation to C18:0 when compared with the control diet. The selenate diet more effi ciently reduced the concentration sums of all SFAs (SFAs) and all fatty acids (FAs) in MLD and MBF than the SeY diet, which most effectively increased the concentrations of SFAs and FAs in MLD and MBF. The selenate diet most effectively increased the body mass gain of lambs.Key words: carnosic acid, fatty acids, methane, ovine rumen, seleno-compounds, volatile fatty acids INTRODUCTIONThe most common supplemental chemical forms of selenium (Se) for ruminants are selenite, selenate or selenized yeast (SeY) [1,2]. The chemical form of Se affects Unauthenticated Download Date | 5/11/18 9:28 AM Acta Veterinaria-Beograd 2016, 66 (3), 373-391 374 biosynthesis yield of Se-complexes and Se-proteins in ruminal microorganisms [3]. Se-methionine (Se-Met) is more effi ciently accumulated in the animal body than inorganic forms of Se. Organic chemical forms of Se undergo less alteration in the rumen leading to less of insoluble chemical forms of Se [1]. Ruminal micro-organisms are capable to metabolize organic and inorganic forms of Se into Se-amino acids (Se-AA). The poor bioaccumulation of inorganic Se has been linked to the ruminal environment whereby selenate or selenite is reduced by microorganisms to insoluble and unavailable elemental Se, which is excreted in the feces [1,3]; selenate has higher relative bioavailability value than selenite. Ruminal microorganisms can reduce excessive doses of organic or inorganic forms of Se to selenides or unabsorbable Se o . Interestingly, Serra et al. [4] showed that dietary Se-compounds change the ruminal production of volatile fatty acids (VFAs). In fact, numerous studies showed that Secompounds affect ruminal microorganism yield and activity of microbiota [1][2][3][4][5][6]. Thus, Se-compounds affect VFAs production and rumen micro...

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“…Se at doses around 0.3 mg Se/kg DM in diet increased (more than by 14%) the molar concentra- Se linear effect 50% grain, P < 0.05, 7 Se quadratic effect 70% grain, P < 0.01, 8 Se quadratic effect 50% grain, P < 0.01, 9 g of microbial nitrogen/kg of OM fermented, 10 nonammonia N leaving the abomasum/N intake tion of butyric acid (Kim et al, 1997;Hernández-Calva et al, 2007). The same way, other authors have reported that the production of acetic, propionic, butyric acids, and total VFA was increased by Se supplementation (Hidiroglou and Lessard, 1976;Wang et al, 2009), and by vitamin E or Se/vitamin E supplementation .…”

Section: Ruminal Fermentationmentioning

confidence: 96%

“…These mi-crobial effects are the cause of the lower absorption of Se in ruminants compared with non-ruminant animals (Serra et al, 1994a). Se availability can affect the in vitro yield of volatile fatty acids (VFA) (Kim et al, 1997) and the in vivo yield of bacterial mass (Serra et al, 1994b), but studies with regard to the effect of Se on nutrient digestibility are few (Serra et al, 1994b;Hernández-Calva et al, 2007). Some effects on microbial activity and digestibility could be observed with a relatively high concentration of Se in the diet.…”

mentioning

confidence: 99%

Effects of dietary level of selenium and grain on digestive metabolism in lambs

Razo-Rodríguez¹,

Ramírez-Bribiesca²,

López‐Arellano³

et al. 2013

CZECH J ANIM SCI

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ABSTRACT:The objective was to evaluate the effect of different levels of selenium with two levels of grain corn in the diets on ruminal, postruminal, and total tract digestion of nutrients, ruminal fermentation characteristics, and selenium balance in lambs. A split-plot design was used in four periods with repeated Latin square using eight Suffolk × Dorset male lambs with four levels of selenium (sodium selenite, Na 2 SeO 3 ), without adding selenium, 0.3, 0.6, and 0.9 mg of selenium/kg dry matter (DM) with 70 and 50% of corn grain in the diet. The four selenium levels affected organic matter as follows: starch, neutral detergent fibre, nitrogen and selenium excretion; selenium ruminal digestion; organic matter, neutral detergent fibre, nitrogen and selenium postruminal digestion; and organic matter, neutral detergent fibre, nitrogen and selenium total tract digestion (P < 0.05). Starch and organic matter flow decreased with 0.6 and 0.9 mg of selenium with the 70% grain diet (P < 0.05). Selenium flow increased linearly with selenium levels (P < 0.01) with both levels of grain. Selenium supplementation increased linearly selenium concentration in ruminal fluid (P < 0.01), but did not affect other ruminal characteristics. Also, selenium absorption and retention was increased by selenium concentrations (P < 0.01). The apparent absorption of selenium increased (31%, P < 0.01) with the 70% grain diet. In conclusion, the high content of nonstructural carbohydrates improved the availability of selenium and 0.9 mg of selenium/kg DM improved the absorption and availability of selenium.

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Studies on the effects of selenium on rumen microbial fermentation in vitro

Cited by 27 publications

References 18 publications

Fontes orgânicas e inorgânicas de selênio na nutrição de vacas leiteiras: digestão, absorção, metabolismo e exigências

Fontes orgânicas e inorgânicas de selênio na nutrição de vacas leiteiras: digestão, absorção, metabolismo e exigências

The Influence of Different Chemical Forms of Selenium Added to the Diet Including Carnosic Acid, Fish Oil and Rapeseed Oil on the Formation of Volatile Fatty Acids and Methane in the Rumen, and Fatty Acid Profiles in the Rumen Content and Muscles of Lambs

Effects of dietary level of selenium and grain on digestive metabolism in lambs

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